HP-67 - 1612A03018 - Card Reader Advice Requested (was HP-67 - strange behavior)

[albertofenini]

No, unluckily we didn't
I can tell you that it happens with this unit, even after the card reader swap, when we try to
read an HP-65 card.
We obviously get an error message after that.
Before we swapped the bakelite part (and the magnetic head of course) it was happening
pretty often even with the HP-67 cards.
My guess, now that it happens only with "non compatible" cards is that while reading is
missing a piece of information that tells the card reader about the length of the card and
that warns the card reader that the card is finished.
At that point the card reader keeps the motor running and because the card is physically over
we get that kind of acceleration noise.
This is just my two cents ... but any idea about why this happens is welcome
Take care !